Lamp-socket.



. TURNER. M. LEFFLER & C. DOUGLAS.

LAMP SOCKET. APPLICATION FILED NOV. 6. I916.

Patented Feb. 11, 1919.

' M ME/Woks.

Malls/10 L ef/Yer:

6/4/14 Paws.

A as 1.

arnnr onnrcn.

-FRAI IK W. TURNER, OF KANSAS CITY, MISSOURI, MARSHALL LEFFLER, OF KANSAS CITY, KANSAS, AND CLARK DOUGLAS, OF KANSAS CITY, MISSOURI.

LAMP-SOCKET.

Specification of Letters Patent.

Patented Feb. 11, 1919.

Application filed November 6, 1916. Serial No. 129,707.

. do declare the following to be a full, clear,

and exact description of the invention, such as'will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a paru of this specification.

Our invention relates to a socket switch for incandescent lamps and has for its principal object to provide switch mechanism for closing or breaking an electric clrcuit through a lamp, which may be operated either by a pull chain or by the ordinary switch key.

In accomplishing thisobject we have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings, wherein Fi ure I is a side view of a lamp socket provided with a switch constructed accord-.

end of the switch sleeve and turn button.

Referring more in detail to the drawings:

1 designates a lamp socket of the ordinary type comprising a tubular body portion 2, having an indrawn neck 3 containing a threaded sleeve 4; the latter being separated from the outer casing by an interior socket lining 5 of any suitable insulating material and threaded to receive the threaded metallic lined base 6 of a lamp bulb 7.

Seated tightly over the upper end of the thereon are socket is a cap 8 having a central opening 9 for receiving the circuit wires 10l1- which lead from an electrical supply source through the switch mechanism, later described, to illuminate the bulb.

Located within the upper portion of the socket casing is a ring 12, preferably of hard rubber or non-conductive fiber and mounted at opposite diametrical points plates 1415 carrying binding posts 161 whereby the circuit wires 1 Ol1 are attached thereto; the plate 15 terminating at its Lower end in a downwardly and inwardly extended arm 18, which is adapted to engage the central con tact point 19 of the bulb 6, while the plate 14 has electrical connection, through the switch mechanism, with the metallic sleeve 4 and base collar 5, to complete the circuit through the bulb filament.

Supported within the ring is a bracket 20 comprising vertical end portions 2l-22 and a cross plate 23, and mounted on the end plate21 is an insulation block 25 having a central openin 26 which registers with a like opening 2 in the plate 21, and slid ably and revolubly extended through the said openings is a sleeve 28. Also mounted on the block 25 and lying flush with the surface thereof at opposite diametrical points are contact plates 2930; the plate 29 connecting at its outer end with the plate let and plate 30 having electrical connection with the socket collar 5.

Revoluble about the sleeve 28 and seated against the block 25 is a collar 31 having points, which are adapted, when the collar is revolved on the sleeve, to simultaneously ride over the plates 29-30 to close a circuit through the switch, and also being adapted to simultaneously seat in stop notches 34 intermediate the contact plates to prevent a retrograde movement of the collar.

Extendin forwardly from opposite peripheral polnts of the collar 31 are fingers 35.35 which are adapted for slidable movement through slots 36-87 at opposite ends of a plate 38 ,which is attached transversely across the end of the sleeve 28 this arrangementbeing provided in order to permit slid able movement of the sleeve within the insulation block 25, and at the same time to ing teeth 43'which are adapted to contact a tooth JE turned inwardly from the plate 22; the plates 22-22 being spaced sufiiciently to allow the wheel 42 to seat against or to be moved inwardly and disengaged from the tooth 44: to allow the spiral shaft to revolve on the hub 39.

Attached to the outer end of the sleeve 28 and extending through a neck 45 in the socket casing is a switch chain 46 whereby the sleeve may be drawn outwardly against the tension of a spring 47 to operate the switch mechanism; the said spring bearing against the plate 38 and collar 31 to yieldingly hold the collar against the block 25- and to return the sleeve to its inner limit after an operation of the switch.

When the parts are so arranged it will be seen that as the sleeve 28 is drawn out wardly by the chain the plate 38 riding along the spiral shaft 40 will draw the ratchet wheel 42 into contact with the tooth 44 to prevent rotation of the spiral shaft and cause the sleeve to rotate and, due to the slidable contact of the plate 88 with the fingers 35-35, will cause a like rotation of thecollar 31 to break or close a circuit through the plates 29-450.

Assuming that a circuit is closed through the switch and the sleeve is in its inner position as shown in Fig. II, to break the circuit through the switch an operator,;by means of the chain 46, draws the sleeve 28 outwardly. This causes the sleeve to be rotated on the spiral shaft during its outward travel, the spiral being arranged to give the sleeve a one-quarter revolution at each operation.

As the sleeve rotates, the collar is likewise carried through a one-quarter revolution to disconnect the switch plates and the circuit thercthrough is broken.

When the chain is released the sleeve is carried back to its normal position by the pressure of the spring 4C7. As the sleeve is moved back retrograde movement of the switch is prevented by the seating of the switch arms in stop notches 34 in the block face between the contact; plates, but the spiral shaft is pern'iitted to revolve, due to the play provided between the end standards 22-22 which allows the ratchet wheel 42 to unseat itself from the tooth 44 as the sleeve return-s.

In order also that the switch may be operated with a turn button, we provide the outer end of the sleeve with a slot 50 for receiving the shank 51 of a button 52 which may be turned by an operator to revolve the sleeve and cause an operation of the switch the same as would otherwise be accomplished by pulling the switch chain.

By so constructing the switch it will be seen that a circuit may pass from the wire 10 plates 14:, 29, switch collar 31, plate 30 to the bulb base 5 and after passing through the bulb filament will return from the post 19, arm 18, plate 15, and wire 11, and that the collar 31 may be rotated either by the chain or turn button to break the contact through the switch parts.

Having thus described our invention what we claim as new therein and desireto se-' cure by Letters-Patent, is

-1 Circuit making and breaking mechanism comprising relatively fixed and movable contact members, a longitudinally mov- I able element, an anchor for said element cooperative therewith to induce rotation of said element upon movement thereof along the anchor, a rotatable mounting for the movable iontact members, means 'on the longitudinal y movable element having sliding connection with the rotatable element to operate the rotatable element upon movement of the longitudinally movable element and means for moving the longitudinally movable element along itsanchor.

2. Gircuit makin and breaking mechanism comprising relatively fixed and movable contact members, a longitudinally movable element, an anchor for said element cooperative therewith to induce rotation of said element upon movement thereof along 105 the anchor, a rotatable mounting for the movable contact members, means on the longitudinally movable element having sliding connection with the rotatable element to opcrate the rotatable element upon movement 110 f the longitudinally movable element, means for rotating the longitudinally movable element directly and means for moving the same along the anchorfor the purpose set forth.

3. Circuit making and breaking mechanism comprising relatively fixed and movable contact members, a longitudinally movable element, an anchor for said element cooperative therewith to inducerotation of said element upon movement thereof along the anchor, a rotatable mounting for the movable contact members, means on the longitudinally movable element havin sliding connection with the rotatable element to opcrate the-rotatable element upon movement of the longitudinally movable I element, means for rotating the longitudinally movable element directly. means for moving the same along the anchor and yieldable means for resisting longitudinal movement of said element and returning the same to initial position.

4. Circuit makin and breaking mechanism comprising re atively fixed and movable contact members, a longitudinally movable element, an anchor for sand element 00- operative therewith to induce rotation of said element upon movement thereof along the anchor, a rotatable mounting for the movable contact members, means on the longitudinally movable element-having sliding connection with the rotatable element to operate the rotatable element upon movement of the longitudinally movable element and means for moving the longitudinally movable element along its anchor, the said element comprising a receiving portion for a removable handle, and a handle cooperaw tive with'th'e receiving portion ofsaid element.

5. In a circuit making and breaking mech I anism, fixed contact points, a spiral adapted to rotate in onedirection, a longitudinally movable sleeve mounted on said spiral and adapted to rotate in a direction opposite thereto;- thesaid sleeve being mounted on said spiral in such cooperative relation therewith as to be rotated by longitudinal move 'tu'res.

movable sleeve adaptedfor rotation in one direction, a collar inclosing said sleeve and slidable thereon having extended contact members adapted for simultaneously en aging or disengaging the fixed points, andav:

mg arms extending forwardly along the sleeve, a spiral coaxial with the said sleeve and adapted to rotatein an opposite direction, a plate fixed to said'sleeve in cooperative relation with the spiral, and having slotted end portions for slidably receiving the collar arms, meansfor efiecting longitudinal movement of thesleeve along the spiral to operate the movable contact points,

and a spring bearing against the anchor member to return said sleeve to normal position after an operation.

In testimony whereof we aifix our signa- .ZFRANK' w. TURNER.

MARSHALL LEFFLER. CLARK DOUGLAS. 

